| ECO D20 in 2003 play it! jonkman harmen defeats white's braunlich tom in 60 moves | 1. d4 d5 2. c4 dxc4 3. e4 Nf6 4. e5 Nd5 5. Bxc4 Nc6 6. Nc3 Nb6 7. Bb5 a6 8. Bxc6+ bxc6 9. Nge2 e6 10. Be3 a5 11. O-O Ba6 12. Qc2 Be7 13. Rfd1 O-O 14. Ne4 Bc4 15. N2g3 Bd5 16. Nh5 Kh8 17. Rac1 Nc4 18. Nf4 Nxb2 19. Re1 Nc4 20. Nd2 Na3 21. Qa4 Bb4 22. Nxd5 cxd5 23. Qc6 Bxd2 24. Bxd2 Nc4 25. Rc2 Qb8 26. Bg5 Qb6 27. Qd7 Qxd4 28. Be7 Rfe8 29. Qxc7 Ra7 30. Bc5 Qxf2+ |
| ECO D20 in 1992 play it! jonkman harmen defeats white's dondergoor evert in 46 moves | 1. d4 d5 2. c4 dxc4 3. e3 e6 4. Bxc4 Nf6 5. Nf3 a6 6. Nc3 b5 7. Bd3 Bb7 8. O-O c5 9. a4 b4 10. Na2 Nbd7 11. b3 cxd4 12. exd4 Be7 13. Bd2 Qb6 14. Rc1 O-O 15. Qe2 Rfd8 16. Be3 Nd5 17. Ne5 N7f6 18. Rfe1 a5 19. Bg5 h6 20. Bxf6 Nxf6 21. Bc4 Rxd4 22. Qe3 Bc5 23. Qh3 Rd2 |
| ECO D03 in 2001 play it! jonkman harmen defeats white's mannen henk in 92 moves | 1. d4 d5 2. Nf3 Nf6 3. Bg5 c5 4. e3 cxd4 5. exd4 Nc6 6. c3 Qc7 7. Qb3 e6 8. Nbd2 Bd7 9. Bd3 Bd6 10. Bxf6 gxf6 11. O-O Rc8 12. Rfe1 Kf8 13. Nf1 Na5 14. Qd1 Nc4 15. Rb1 b5 16. Nh4 h5 17. Qf3 Rh6 18. Re2 a5 19. Rbe1 f5 20. a3 b4 21. axb4 axb4 22. g3 bxc3 23. bxc3 Na3 24. Rc1 Qa5 25. Qe3 Rh8 26. Qg5 Be7 27. Qf4 Qc7 28. Qxc7 Rxc7 29. Nf3 Bb5 30. Ne5 Bxd3 31. Nxd3 Nb5 32. Rb2 Nd6 33. Rb8+ Kg7 34. Rxh8 Kxh8 35. Ne5 Kg7 36. Ne3 Nb5 37. c4 Nxd4 38. Rd1 Bf6 39. f4 Bxe5 40. fxe5 Ne2+ 41. Kf1 Nc3 42. Rd3 d4 43. Rxd4 Rc5 44. Ng2 Rxe5 45. Nf4 h4 46. Nd3 Re2 |
| ECO D02 in 2004 play it! jonkman harmen defeats white's markus john raym in 70 moves | 1. d4 d5 2. Nf3 Nf6 3. Bf4 Nh5 4. Bg3 Nxg3 5. hxg3 c6 6. c3 Bf5 7. Nbd2 Nd7 8. e3 h6 9. Nh4 Bh7 10. f4 e6 11. g4 Nf6 12. f5 Bd6 13. Rh3 Qb6 14. Rb1 e5 15. Be2 O-O 16. Kf1 Rae8 17. b4 Qc7 18. c4 exd4 19. exd4 Re7 20. c5 Bf4 21. g3 Bxg3 22. Ng2 Rfe8 23. Rb3 Bf4 24. Bf3 h5 25. gxh5 Bxf5 26. Rh1 Bg5 27. Kf2 Be4 28. Bxe4 dxe4 29. Nc4 e3+ 30. Ncxe3 Bxe3+ 31. Rxe3 Rxe3 32. Nxe3 Ne4+ 33. Kg1 Qg3+ 34. Ng2 Nc3 35. Qd2 Re2 |
| ECO D02 in 1999 play it! jonkman harmen defeats white's schwalbe gerhard in 78 moves | 1. d4 d5 2. Nf3 Nf6 3. c4 dxc4 4. Qa4+ Nbd7 5. Qxc4 e6 6. Bf4 Nd5 7. Bg3 b5 8. Qc1 c5 9. e4 N5f6 10. Nc3 a6 11. e5 cxd4 12. Nxd4 Nh5 13. Qe3 Nxg3 14. hxg3 Qc7 15. f4 Bb7 16. Rc1 Bc5 17. Ne4 Bb4+ 18. Kf2 Qb6 19. a3 Be7 20. b4 Rd8 21. Rd1 f6 22. Nd6+ Bxd6 23. exd6 Bd5 24. Be2 O-O 25. f5 Rfe8 26. Nc2 exf5 27. Qxb6 Nxb6 28. Ne3 Be4 29. Rd4 Rd7 30. Bd1 g6 31. Bb3+ Kg7 32. Rc1 Red8 33. Rcd1 Nc8 34. g4 Rxd6 35. Rxd6 Rxd6 36. Rc1 Rd2+ 37. Kf1 Rd3 38. Rc7+ Kh6 39. Bg8 Rxe3 |
| ECO D02 in 2002 play it! jonkman harmen defeats white's ristic nenad in 82 moves | 1. d4 d5 2. Nf3 Nf6 3. c4 dxc4 4. e3 e6 5. Bxc4 a6 6. O-O b5 7. Bb3 Bb7 8. Qe2 c5 9. a4 b4 10. Rd1 Nbd7 11. Nbd2 Be7 12. e4 cxd4 13. e5 Nd5 14. Ne4 Qb8 15. Nd6+ Bxd6 16. exd6 Qxd6 17. Rxd4 O-O 18. Bc2 e5 19. Rh4 N5f6 20. Bg5 e4 21. Nd2 Qe5 22. Bxf6 Nxf6 23. Nxe4 Bxe4 24. Bxe4 Rfe8 25. Re1 g5 26. Rg4 Nxg4 27. Qxg4 f5 28. Bd5+ Kh8 29. Rxe5 fxg4 30. Rxe8+ Rxe8 31. g3 Re1+ 32. Kg2 Kg7 33. b3 Re2 34. Bc4 Rb2 35. h3 gxh3+ 36. Kxh3 Kf6 37. Kg4 a5 38. f3 Rd2 39. f4 gxf4 40. gxf4 Rd4 41. Bg8 Rd3 |
| ECO D21 in 2001 play it! jonkman harmen defeats white's cruzlopez claret in 94 moves | 1. d4 d5 2. c4 dxc4 3. Nf3 e6 4. e3 Nf6 5. Bxc4 a6 6. O-O c5 7. Qe2 b5 8. Bb3 Bb7 9. a4 b4 10. Nbd2 Be7 11. Nc4 O-O 12. Rd1 Nbd7 13. a5 Qc7 14. Nfe5 Rfd8 15. Bd2 Nxe5 16. dxe5 Nd7 17. f4 Nb8 18. Bc2 Nc6 19. Qh5 g6 20. Qh3 Na7 21. Be1 Rxd1 22. Bxd1 Bd5 23. Nb6 Rd8 24. Nxd5 Rxd5 25. Be2 Nc6 26. Rc1 Rd8 27. Bxa6 Rb8 28. Bh4 Qxa5 29. Bc4 Qd8 30. Bxe7 Nxe7 31. Bxe6 Qd2 32. Rf1 Qxb2 33. Rd1 Rf8 34. Rd7 Qb1+ 35. Kf2 Qc2+ 36. Kf3 Nf5 37. g4 Ng7 38. Bd5 Qd1+ 39. Kg3 Qe1+ 40. Kf3 Qd1+ 41. Kg3 Qe2 42. Kh4 c4 43. Kg5 c3 44. e6 Qb5 45. f5 c2 46. fxg6 Nxe6+ 47. Kf6 hxg6 |
| ECO D02 in 1999 play it! jonkman harmen defeats white's krumwiede karste in 44 moves | 1. d4 d5 2. Nf3 Nf6 3. c4 dxc4 4. Nc3 e6 5. e4 Bb4 6. Bg5 c5 7. Bxc4 cxd4 8. Nxd4 Bxc3+ 9. bxc3 Qa5 10. Bb5+ Nbd7 11. Bxf6 gxf6 12. O-O a6 13. Be2 Nc5 14. Re1 Bd7 15. Bh5 Qc7 16. Rb1 Rg8 17. h4 Rg7 18. Qe2 Rc8 19. e5 f5 20. Qf3 Ne4 21. Qf4 Kf8 22. Rbc1 Qa5 |
| ECO D00 in 1999 play it! jonkman harmen defeats white's schmitzer peter in 104 moves | 1. d4 d5 2. Bg5 c5 3. e3 Nf6 4. Nc3 Nc6 5. dxc5 e6 6. Nf3 Bxc5 7. Be2 a6 8. a3 b5 9. Nd4 Bb7 10. O-O h6 11. Bf4 Nd7 12. Bg3 Bxd4 13. exd4 Qb6 14. Bd3 Qxd4 15. Qe2 O-O 16. Rad1 Qf6 17. Rfe1 Nb6 18. Bd6 Rfc8 19. f4 Nd7 20. Qg4 Na5 21. Be5 Nxe5 22. fxe5 Qg5 23. Qxg5 hxg5 24. Ne2 Nc4 25. Bxc4 Rxc4 26. Nd4 Kh7 27. Re3 Kg6 28. c3 Rh8 29. g3 Bc8 30. Rf1 Bd7 31. Ref3 Rf8 32. h4 f5 33. hxg5 Kxg5 34. Kg2 Rh8 35. Rf4 a5 36. R1f2 g6 37. Rf1 Rh5 38. R1f2 Kh6 39. g4 Rg5 40. Kg3 Kg7 41. Kh4 Kh6 42. Kg3 b4 43. axb4 axb4 44. cxb4 Rxg4+ 45. Rxg4 fxg4 46. Rf4 Kh5 47. Rxg4 g5 48. b3 Rxb4 49. Kh3 Bc8 50. Kg3 Ba6 51. Kh3 Bf1+ 52. Kg3 Be2 |
| ECO D00 in 2006 play it! jonkman harmen defeats white's luconi cristian in 42 moves | 1. d4 d5 2. Bf4 Nf6 3. e3 c5 4. c3 Nc6 5. Nd2 g6 6. Ngf3 Bg7 7. Be2 cxd4 8. cxd4 Nh5 9. Bg5 h6 10. Bh4 g5 11. Bg3 Nxg3 12. hxg3 g4 13. Ng1 e5 14. Bxg4 exd4 15. Bxc8 Rxc8 16. e4 Qe7 17. Rh4 Bf6 18. Qe2 Bxh4 19. gxh4 Kd8 20. Qg4 Re8 21. f3 Qe5 |
| ECO D21 in 2002 play it! jonkman harmen defeats white's van beek lucien in 125 moves | 1. d4 d5 2. c4 dxc4 3. Nf3 e6 4. e3 a6 5. Bxc4 c5 6. O-O Nf6 7. b3 b6 8. Bb2 Bb7 9. Nbd2 Nbd7 10. Qe2 Be7 11. Rfd1 O-O 12. Rac1 b5 13. Bd3 Rc8 14. Ne5 cxd4 15. Rxc8 Qxc8 16. Bxd4 Nxe5 17. Bxe5 Rd8 18. Qf1 Qc5 19. Bxf6 gxf6 20. Nf3 Rc8 21. a4 bxa4 22. bxa4 Qa5 23. Rb1 Rc7 24. Qd1 f5 25. Nd4 Bf6 26. Be2 Qc3 27. Bf3 Bxf3 28. Nxf3 Rc5 29. g3 Rd5 30. Qe2 Ra5 31. Qa2 Qc6 32. Qe2 Qxa4 33. h4 h6 34. Kg2 Qa2 35. Rb8+ Kg7 36. Qd1 Qd5 37. Qc1 Rc5 38. Qa3 Be5 39. Re8 a5 40. h5 Qc6 41. Rd8 Bf6 42. Rb8 Qc7 43. Ra8 Qb6 44. Qa4 Qb5 45. Qd1 Qb7 46. Re8 Rc8 47. Rxc8 Qxc8 48. Qa4 Qa8 49. g4 Qe4 50. Qxe4 fxe4 51. Nd2 a4 52. Nxe4 a3 53. Nc5 a2 54. Nb3 Kf8 55. f4 Ke7 56. Kf3 Kd6 57. Ke4 Kc6 58. Kd3 Kb5 59. Kc2 Kc4 60. Nd2+ Kb4 61. Nb3 Bc3 62. e4 Kc4 63. e5 |
| ECO D20 in 2001 play it! jonkman harmen defeats white's mittelman gur in 140 moves | 1. d4 d5 2. c4 dxc4 3. e3 Nf6 4. Bxc4 e6 5. Nf3 c5 6. O-O a6 7. Bb3 b5 8. a4 b4 9. Nbd2 Bb7 10. e4 cxd4 11. e5 Nfd7 12. Nc4 Nc5 13. Bg5 f6 14. exf6 gxf6 15. Nxd4 h5 16. Nxe6 Qxd1 17. Raxd1 fxg5 18. Nxc5 Bxc5 19. Rfe1+ Kf8 20. Na5 Ra7 21. Rd8+ Kg7 22. Rxh8 Kxh8 23. Re8+ Kg7 24. Rxb8 Be4 25. Rg8+ Kf6 26. Rc8 Bb6 27. Nc4 Bd4 28. Nd2 Re7 29. Nxe4+ Rxe4 30. Rc6+ Ke5 31. Kf1 Bxb2 32. Rxa6 Kd4 33. Rc6 Re5 34. Rc2 Ba1 35. g3 Kd3 36. Rc6 Bd4 37. Kg2 g4 38. Rc4 Re2 39. Kg1 Bxf2+ 40. Kh1 Rb2 41. Rxb4 Kc3 42. Rb5 Rxb3 43. Rxh5 Kd3 44. Rh4 Rb4 45. h3 Bxg3 46. Rxg4 Bf4 47. Kg2 Ke3 48. Rg8 Rb2+ 49. Kf1 Kf3 50. Re8 Ra2 51. h4 Rxa4 52. h5 Ra1+ 53. Re1 Ra5 54. Re8 Ra1+ 55. Re1 Ra2 56. Re8 Rh2 57. Rg8 Rxh5 58. Rg2 Rh1+ 59. Rg1 Rh2 60. Rg7 Be3 61. Rf7+ Bf4 62. Rg7 Ra2 63. Re7 Rf2+ 64. Ke1 Rh2 65. Kd1 Be3 66. Re8 Rd2+ 67. Ke1 Rd7 68. Rf8+ Bf4 69. Rf5 Rh7 70. Kd1 Rc7 |
| ECO D20 in 1996 play it! jonkman harmen defeats white's erwich frans in 62 moves | 1. d4 d5 2. c4 dxc4 3. e4 Nf6 4. Nc3 e5 5. Nf3 exd4 6. Nxd4 a6 7. Bxc4 c5 8. Qb3 Qe7 9. Nde2 b5 10. Bd5 Bb7 11. Bg5 Nc6 12. O-O O-O-O 13. Nxb5 axb5 14. Qxb5 Na7 15. Qc4 Bxd5 16. exd5 Kb8 17. Nc3 Qc7 18. Bf4 Bd6 19. Bxd6 Rxd6 20. Rfd1 Rb6 21. Na4 Rb4 22. Qc2 Rc8 23. Rac1 Nd7 24. a3 Rd4 25. Qb3+ Qb7 26. Qg3+ Ka8 27. b4 cxb4 28. axb4 Qxd5 29. Qf3 Qxf3 30. gxf3 Rxc1 31. Rxc1 Rxb4 |
| ECO D20 in 2003 play it! jonkman harmen defeats white's bodicker rob in 56 moves | 1. d4 d5 2. c4 dxc4 3. e4 Nf6 4. e5 Nd5 5. Bxc4 Nb6 6. Bb3 Nc6 7. Ne2 Bf5 8. Nbc3 e6 9. a3 Qd7 10. Be3 O-O-O 11. O-O h5 12. Bc2 Bxc2 13. Qxc2 f6 14. Rfd1 Nd5 15. Nxd5 exd5 16. Qa4 Kb8 17. Nc3 h4 18. h3 g5 19. f3 Bh6 20. Kh2 f5 21. b4 g4 22. Bxh6 Rxh6 23. Qc2 Rg8 24. Qb3 gxh3 25. gxh3 Qe7 26. Rg1 Rhg6 27. Ne2 R8g7 28. Kh1 Nxd4 |
| ECO D02 in 2003 play it! jonkman harmen defeats white's benen samson in 76 moves | 1. d4 d5 2. Nf3 Nf6 3. c4 dxc4 4. e3 e6 5. Bxc4 a6 6. O-O b5 7. Be2 Nbd7 8. a4 b4 9. Nbd2 c5 10. Nc4 Bb7 11. Nfe5 Qc7 12. Bf3 Be7 13. Nxd7 Nxd7 14. d5 exd5 15. Bxd5 Bxd5 16. Qxd5 Rd8 17. b3 O-O 18. Bb2 Bf6 19. Rac1 Nb6 20. Qf5 Bxb2 21. Nxb2 Rd5 22. Qe4 a5 23. Nc4 Rh5 24. g3 Nd5 25. Qf3 g6 26. Rcd1 Nc3 27. Rd6 Rd8 28. Qc6 Qe7 29. h4 Rd5 30. Rxd5 Rxd5 31. Nxa5 Qe4 32. Qc8+ Kg7 33. Qh3 Qd3 34. Qg2 Ne4 35. Rc1 Rf5 36. Rf1 Nd2 37. Rc1 Qe2 38. Nb7 Nxb3 |
| ECO D03 in 1992 play it! jonkman harmen defeats white's ziger silvestar in 88 moves | 1. d4 d5 2. Nf3 Nf6 3. Bg5 Ne4 4. Bf4 c5 5. e3 Qb6 6. Qc1 Nc6 7. c3 Bf5 8. Nbd2 Rc8 9. Be2 h6 10. O-O e6 11. Nxe4 Bxe4 12. Qd2 Be7 13. Ne5 Nxe5 14. Bxe5 O-O 15. dxc5 Qxc5 16. a4 a5 17. Ra3 f6 18. Bd4 Qc6 19. Rb3 Bd8 20. Rb5 b6 21. f3 Bg6 22. c4 dxc4 23. Rc1 Qd6 24. e4 Be8 25. e5 fxe5 26. Rxe5 Bg5 27. Rxg5 hxg5 28. Qe3 Qd5 29. Rd1 Bxa4 30. Rd2 Rfd8 31. Bc3 Qc5 32. Bd4 Qf5 33. Bxb6 Rxd2 34. Qxd2 Qd5 35. Qe3 Rb8 36. Bd4 Bd7 37. Be5 Rb5 38. Bc3 a4 39. Qa7 Qc5+ 40. Qxc5 Rxc5 41. Kf2 Kf7 42. Ke3 e5 43. Bb4 Rc8 44. Bd1 c3 |
| ECO D27 in 1994 play it! jonkman harmen defeats white's hoang thang tran in 58 moves | 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. b3 cxd4 8. Nxd4 Bd6 9. Bb2 O-O 10. Nd2 e5 11. N4f3 Qe7 12. Qc2 Nc6 13. a3 Bg4 14. h3 Bd7 15. Rfd1 b5 16. Bd3 Rfc8 17. Qb1 Na5 18. Ne4 Nxe4 19. Bxe4 Bc6 20. Nd2 g6 21. Bc3 Nb7 22. Qb2 Nc5 23. Bxc6 Rxc6 24. Nf3 e4 25. Bf6 Qe6 26. Bh8 f6 27. Ng5 Be5 28. Rd4 Qe7 29. b4 Kxh8 |
| ECO D02 in 2000 play it! jonkman harmen defeats white's carneiro carlos in 48 moves | 1. d4 d5 2. Nf3 Nf6 3. c4 dxc4 4. e3 a6 5. a4 e6 6. Bxc4 c5 7. O-O Nc6 8. Nc3 Be7 9. h3 O-O 10. Bd3 h6 11. Ne4 cxd4 12. exd4 Nxd4 13. Ne5 Nd7 14. f4 f5 15. Nc3 Nxe5 16. fxe5 Nc6 17. Re1 Bc5+ 18. Kh1 Qe7 19. Qf3 Bd7 20. Qg3 Nb4 21. Bb1 Kh8 22. h4 Rg8 23. h5 Qf7 24. Qh2 Be8 |
| ECO D20 in 2006 play it! jonkman harmen defeats white's hopman pieter in 116 moves | 1. d4 d5 2. c4 dxc4 3. e4 e5 4. Nf3 Bb4+ 5. Nc3 exd4 6. Qxd4 Qxd4 7. Nxd4 Ne7 8. Bxc4 a6 9. a3 Bd6 10. f4 b5 11. Be2 Bb7 12. Nb3 Nd7 13. Be3 f6 14. Kf2 O-O-O 15. Rhc1 Kb8 16. Bf3 h6 17. Ne2 g5 18. g3 g4 19. Bg2 h5 20. Na5 Ba8 21. a4 b4 22. Nb3 h4 23. Ned4 hxg3+ 24. hxg3 Rh2 25. Kf1 Rdh8 26. Bg1 Rxg2 27. Kxg2 Bxe4+ 28. Kf2 Rh3 29. Re1 f5 30. Rac1 Nd5 31. Ne6 Nxf4 32. gxf4 Rxb3 33. Re2 Nb6 34. Ke1 Nd5 35. Bc5 Bxf4 36. Rc4 Bg3+ 37. Bf2 Bd3 38. Nc5 Bxf2+ 39. Rxf2 Bxc4 40. Nxb3 Bxb3 41. Rxf5 a5 42. Rg5 Kb7 43. Kd2 Kb6 44. Rxg4 Bxa4 45. Rg6+ c6 46. Rg8 Bb5 47. Kc1 Kc5 48. Rh8 a4 49. Kb1 Bd3+ 50. Ka1 Ne3 51. Rh5+ Kc4 52. Rh4+ Kb3 53. Rh3 a3 54. bxa3 Nc2+ 55. Kb1 Nxa3+ 56. Ka1 Kc3 57. Rh5 Nc4 58. Rh2 b3 |
| ECO D20 in 2005 play it! jonkman harmen defeats white's avrukh boris in 84 moves | 1. d4 d5 2. c4 dxc4 3. e3 e6 4. Bxc4 a6 5. Nf3 Nf6 6. O-O b5 7. Bd3 c5 8. a4 bxa4 9. e4 Bb7 10. e5 Nfd7 11. Nc3 Be7 12. Be4 Bxe4 13. Nxe4 cxd4 14. Qxd4 O-O 15. Qxa4 Nb6 16. Qc2 Qc8 17. Qb1 h6 18. Be3 Nd5 19. Rc1 Qb7 20. Bc5 Nd7 21. Bxe7 Nxe7 22. Nd6 Qb8 23. Qe4 Nd5 24. Qd4 Rd8 25. Nc4 Qb4 26. Qd2 Rdb8 27. Ra3 a5 28. g3 a4 29. Qxb4 Rxb4 30. Nfd2 Rc8 31. Raa1 N7b6 32. Nxb6 Rxc1+ 33. Rxc1 Nxb6 34. Rc2 g5 35. f3 Rb5 36. Ne4 Rxe5 37. Nc5 Rd5 38. Kf2 Rd4 39. Ke2 Kg7 40. Nd3 Rc4 41. Rxc4 Nxc4 42. Kd1 Nxb2+ |